Question

Which of the following slabs show large movements with a change in moisture content?

(a) Plaster slab

(b) Concrete slab

(c) Wood-wool slab

(d) Metal slab

This question was posed to me by my college professor while I was bunking the class.

My query is from Types of Partitions in section Cavity Walls & Partition Walls of Construction & Building Materials

Answer 1

Right answer is (c) Wood-wool slab

To explain I would say: Wood-wool comprises of long wood fibres bound together with cement. Wood-wool slabs show large movements with a change in moisture content. Care must be taken in order to restrain such movements.